# [Tutor] prime test problem

Roelof Wobben rwobben at hotmail.com
Sat Aug 21 19:14:05 CEST 2010

```Hello,

I tried it with this simple programm

def is_prime(n):
x=2
while x <= int(n**0.5)+1:
if n % x == 0:
return False

x=x+1;
return True

x=is_prime(7)
if x==True:
print 7, "is een prime getal"
else :
print 7, "is geen prime getal"

But this one gets in a indefinitive loop.

Roelof

> From: steve at pearwood.info
> To: tutor at python.org
> Date: Sun, 22 Aug 2010 02:49:26 +1000
> Subject: Re: [Tutor] prime test problem
>
> On Sun, 22 Aug 2010 12:41:03 am Roelof Wobben wrote:
> > Hello,
> >
> > I know.
> > I have read them all I believe
>
> You've read all 64 million pages that Google finds? Wow, you must be a
>
> > but I can't see how I can convert the
> > algebra to a working programm.
>
> Have you *tried*?
>
> Perhaps you should try something a little bit less ambitious. Write a
> program to test whether a number is divisible by 3. Then write a
> program to test whether a number is divisible by 3 or 5. Then write a
> third program to test whether a number is divisible by 3, 5 or 7.
>
> Then generalise that third program.
>
> Off you go. Come back when you have some code. Even if it isn't working
> code, at least try something.
>
>
>
> --
> Steven D'Aprano
> _______________________________________________
> Tutor maillist - Tutor at python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/tutor/attachments/20100821/334000b2/attachment.html>
```